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Patented May 13, 1919.

ATTORNEY UNITED STATES PATENT OFFICE.

WILLIAM A. D. .EVANS, OF NEW YORK,

N. Y., ASSIGNOR T COOPER HEWITT ELECTRIC COMPANY, OF HOBOKEN, NEWJERSEY, A CORPORATION OF NEW JERSEY.

ELECTROTHERAPEUTICAL DEVICE.

Specification of Letters Patent.

Patented May 13, 1919.

Application filed July 25, 1914. Serial no. $153,009.

. a specification.

In another application executed on the same day herewith, Serial No.853,008, filed July 25, 1914, I have shown and described a therapeuticalappliance comprising var1- ous features, among which is that of a quartzlamp mounted in a cylindrical container which is provided with anopening through which ultra-violet rays may pass and which is alsocapable of rotation upon its central axis. In the said application theopening in the cylindrical container is closed off by an adjustableshutter forregulating the amount of surface to be covered by therotation in any given instance. The said application also shows anddescribes the electrical circuits.

In the present application the improvement resides mainly in thesubstitution for the adjustable shutter of devices whereby the rays canbe brought to the surface which is to be treated. The invention alsorelates to other matters which are closely associated with those named,as will appear from the present specification.

' In the drawings Figure 1 is a vertical section through the containingcylinder showing the parts within the same and various other details;Fig. 2 is an end view of the apparatus; and Figs. 3 and 4: are detailsectional views.

The main support for the apparatus is indicated at 1 as comprising asuitable head capable of being connected by a neck 2 with any suitableclamping device (not shown). Formed in one piece with or connected tothe head 1 is a bracket 3, the arms of which embrace the ends of thecylinder 4. Inside the cylinder is a frame, 5, also provided with armswhich terminate in journals or bearings, 6, 6, passing through the endsof the cylinder 4:. The journals 6, 6 constitute bearings for thecylindrical heads and the said cylinder is free to rotate about thebearings which pass through the central portion,

7, .7, being provided. Outsuitable washers,

3, nuts 8, 8, are

side the arms of the bracket the space between the quartz disks.

screwed on and prevented by pins 9, 9, from being inadvertentlydetached.

The part, 10, represents a quartz lamp having one terminal thereofjoined to a binding post, 11, and thence by wire, 12, with one side ofthe circuit and the other terminal joined to a binding post, 13, andthence by wire, 14, to the other side of the circuit. For starting thelamp I employ a bell-crank lever, 15, one arm of which passes under apin, 16, on a frame, 17, supporting the lamp and the other arm of whichextends downward into line with a push rod, 18, so that when the saidpush rod is manipulated, the right hand end of the lamp, 9, is liftedand mercury is caused to flow from one electrode to the other therebyclosing an electric circuit through mercury and ultimately, whenthe'mercury is ruptured, causing the startin of the lamp through vapor,the productlon of luminous rays and also of ultra-violet radiation. Ventholes, 19, 19,.carry'ofi' the heated vapors from the interior of thecylinder and a shield, 20, is also provided. The parts 21, 21, areobservations windows.

At the lower side of the cylinder, as represented in the figures, thereis an opening surrounded by a flange, 22, to which a telescopic device,23, is secured, the same being rovided at its lower end .with quartzdisks, 24: and 25, leaving a space at the lower end of the telescopewhich can be surrounded and kept cool by means of water circulation,asthrough inlet and outlet pipes 26 and 27 communicating with a pipe,28, surrounding By this means the space and the disks may be keptcomparatively cool, as is desirable, particularly in connection with thedisk 25 which is adapted to be brought into intimate contact with thatportion of the body which is to be treated by the apparatus. The wallssurrounding the space-referred to are cut away to allow the pipe 28 tolie ercise thereby a more powerful effect upon the air within the spaceand upon the disks.

A modification of the device described is shown in Fig. 3 where thetelescopic device is replaced by a tube 29 of small diameter adapted tobe inserted in a wound upon the sub ect treated. Or, the telescopicdevice itself may be made small enough to serve this purpose. The tube29 may be surwithin it and exrounded by a sleeve, 30, around which apipe, 31, is wound spirally to provide for Water circulation for coolingpurposes.

The angular portion of the cylinder and its openings may be shifted bymeans of devices such as lips 32, 32, at the top of the cylinder 4,embracing a continuous rim, 33, around the cylinder and cooperating withgripping plates 34, 34, adapted to be pressed by means of a thumb-screw,35, against the rim, 33, for holding the apparatus in place afteradjustment; i In both the described forms of apparatus the part throughwhich the ultra-violet radiation emerges may be pressed against or intothe wound. This might be of advantage in many cases since the describedaction Would tend to keep the blood away from that portion of the bodyto be treated and thus prevent the absorption of ultra-violet radiationby the blood itself.

I claim as my invention:

The combination With a quartz lamp of suitably supported quartz platesconstituting the transition elements of the radiation of the lamp, saidplates being spaced apart, and means outside the path of radiation forcooling the intervening space and the plates.

Signed at New York in the county of New York and State of New York this23 day of July A. D. 1914-.

WILLIAM A-. 1). EVANS.

